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CVE-2016-7429

20
FAUCET Score

CVE-2016-7429 describes a denial-of-service vulnerability in NTP versions prior to 4.2.8p9. An attacker can prevent communication with a legitimate NTP source by sending a crafted response to an interface the source does not use. This vulnerability has a low CVSS score of 3.7, indicating a low impact (denial of service) with high attack complexity and no user interaction required. There is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.2.8CPE matchmatch criteria
cpe:2.3:a:ntp:ntp:*:p8:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

3.7LOW

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
2.2
Impact Score
1.4
CvssVersion
3.0

Exploit Intelligence

EPSS Score
7.42%
Probability of exploitation in next 30 days
EPSS Percentile
93.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0742 is in the 94th percentile among its peer group of 1,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.3 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: ntp-0:4.2.6p5-10.el6_8.2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: ntp-0:4.2.6p5-25.el7_3.1
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: ntp

Vendor Advisories (1)

redhatCVE-2016-7429Low

ntp: Attack on interface selection

Nov 21, 2016

References

nwtime.org / ntp428p9_release
Release NotesVendor Advisory
rhn.redhat.com / errata/RHSA-2017-0252.html
bto.bluecoat.com / security-advisory/sa139
h20566.www2.hpe.com / hpsc/doc/public/display
support.ntp.org / bin/view/Main/NtpBug3072
Issue TrackingMitigationVendor Advisory
support.ntp.org / bin/view/Main/SecurityNotice
Vendor Advisory
kb.cert.org / vuls/id/633847
Third Party AdvisoryUS Government Resource
oracle.com / technetwork/security-advisory/cpuoct2017-3236626.html
securityfocus.com / bid/94453
securitytracker.com / id/1037354